Voltage to coil

On the ballast resistor there should be 3 wires. 1 on one side, and 2 on the side going to the coil.

The 2 on the side to the coil is 1 feed that is regulated by the resistor, the other is a bypass feed from the ignition switch. The bypass feed bypasses the resistor during start mode and you get full battery voltage (or 9 to 11 in start mode) to the coil.

I'd check for full voltage to the coil in START mode. That bypass feed doesn't have to be on the resistor, it can be on the coil.